Fish is their sole means of subsistence. In some few places, however, they sow with grain some patches of land, and eat the produce as a viand of luxury along with the fish which forms the staple of their diet. The better class of the population in building their houses use, instead of wood, the bones of whales stranded on the coast, the broadest bones being employed in the framework of the doors. Poor people, and these are the great majority, construct their dwellings with the backbones of fish.[78] XXX. Whales of enormous size frequent the outer ocean, besides other fish larger than those found in the Mediterranean. Nearkhos relates that when they were bearing away from Kyiza, the sea early in the morning was observed to be blown up into the air as if by the force of a whirlwind. The men greatly alarmed enquired of the pilots the nature and cause of this phenomenon, and were informed that it proceeded from the blowing of the whales as they sported in the sea. This report did not quiet their alarm, and through astonishment they let the oars drop from their hands. Nearkhos, however, recalled them to duty, and encouraged them by his presence, ordering the prows of those vessels that were near him to be turned as in a sea-fight towards the creatures as they approached, while the rowers were just then to shout as loud as they could the _alala_, and swell the noise by dashing the water rapidly with the oars. The men thus encouraged on seeing the preconcerted signal advanced to action. Then, as they approached the monsters, they shouted the _alala_ as loud as they could bawl, sounded the trumpets, and dashed the water noisily with the oars. Thereupon the whales, which were seen ahead, plunged down terror-struck into the depths, and soon after rose astern, when they vigorously continued their blowing. The men by loud acclamations expressed their joy at this unexpected deliverance, the credit of which they gave to Nearkhos, who had shown such admirable fortitude and judgment. We learn further, that on many parts of the coast whales are occasionally stranded, being left in shallow water at ebb-tide, and thus prevented from escaping back to sea, and that they are sometimes also cast ashore by violent storms. Thus perishing, their flesh rots away, and gradually drops off till the bones are left bare. These are used by the natives in the construction of their huts, the larger ribs making suitable bearing beams, and the smaller serving for rafters. The jaw-bones make arches for the door-ways, for whales are sometimes five and twenty _orguiæ_ (fathoms) in length.[79]